Z93 had Grease from 1993 until about 1996-1997, when he was replaced by ATL radio veteran Gary McKee. McKee didn't have his fastball anymore but still did a good job.
The legend has it (and please forgive me if I start a flame war here) that Jesse Helms was threatening to block Infinity's purchase of Z93 unless they promised to not put Stern on it. Grease was Infinity's #2 choice for Z93.
Everyone knew or quickly learned that Grease's show was NSFW or children and adjusted their radio accordingly.
Nobody really protested the content of the show. Rather, people eventually quit listening because, c'mon, how many times can you tell a joke with, say, the rape scene in Deliverance as the punch line and keep it fresh? If you listened to his show for a month, I would imagine you've heard every gag and every song and every code word. Although one memorable, rare live comment went something like this...
Traffic Guy: A wreck on the Downtown Connector has traffic SNARLED!
Grease: You mean someone's snarlin' the traffic? Hmmmm...
I'll leave it to you to look up what "snarlin'" is a code word for.
Sometimes he would present them differently, but it got old quick as his shows were not topical (as Stern or TRG are).
Grease got pulled in ATL long efore the "drag them behind trucks" comment.